Quoting Barry Desborough <[EMAIL PROTECTED]>:
> If you're concerned about a SIP phone being unplugged with a call up,
> you
> can send periodic INVITEs for the current call leg and check for
> responses.
> Also, you could also check for ICMP destination/port unreachable
> messages
> for signaling and media.
>
> Barry Desborough
OK, but we are not notified that a SIP phone is unplugged when no call is up.
To Check ICMP messages I have to send messages. What if no messages are sent ?
Does it mean that there no offcial mechanism to check plug/unplug state of a SIP
phone?
patrick
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